Posted By: Streetwize
#5 main oil plug....not used in Hyd Roller SB's? - 06/14/09 02:06 PM
This 318 block is an 88 Hydraulic roller, I'll be running a 236/240 @.050 Comp XE grind spinning it about 6200-6500. I noticed when I tore it down there was not the typical Plug in the #5 passeage that restricts the oil from going directly to the lifters... so no I'm wondering should I leave it out, plug it or if anybody knows any tricks for these Hydraulic roller motors.
I've done a lot of smallblocks but mainly older 340's and 360's that all had the plug.
I always open up the main cap oil passage and pump discharge hole to 1/2" and was going to open up the main saddles a tad, but knowing a lot of you are racing these later blocks I figured I'd ask for any tips-n-tricks you guys might use. Leaving the plug out drops the oil pressure and diverts some oil that would normally pump directly through the mains which was why the plug was normally used, but it's got me wondering if anybody drills the plug to allow some oil through.
I'm going to run one of the Kevko rear sump pans (pretty nice stuff, they do mainly circle track)and if you don't have t orun a center sump it's arguably a lot more 'bank for the buck' than the 30 yr old Milo or Moroso design and pick-ups and a ported HV pump.
http://www.kevkoracing.com/mopar.htm
BTW, one little 318/341 nuggett to pass on....I set the crank in it to mock up the slugs on the aluminum rods to check clearance....both bottom sdies of the bores need to be 'tootsie rolled' to clear the fatty rods....the downside to a small bore that wouldn't even be an issue with a 4+ inch bore block....the price of being different I guess
I've done a lot of smallblocks but mainly older 340's and 360's that all had the plug.
I always open up the main cap oil passage and pump discharge hole to 1/2" and was going to open up the main saddles a tad, but knowing a lot of you are racing these later blocks I figured I'd ask for any tips-n-tricks you guys might use. Leaving the plug out drops the oil pressure and diverts some oil that would normally pump directly through the mains which was why the plug was normally used, but it's got me wondering if anybody drills the plug to allow some oil through.
I'm going to run one of the Kevko rear sump pans (pretty nice stuff, they do mainly circle track)and if you don't have t orun a center sump it's arguably a lot more 'bank for the buck' than the 30 yr old Milo or Moroso design and pick-ups and a ported HV pump.
http://www.kevkoracing.com/mopar.htm
BTW, one little 318/341 nuggett to pass on....I set the crank in it to mock up the slugs on the aluminum rods to check clearance....both bottom sdies of the bores need to be 'tootsie rolled' to clear the fatty rods....the downside to a small bore that wouldn't even be an issue with a 4+ inch bore block....the price of being different I guess